Material handling device



June l, 1948. G, J, HULBERT 2,442,413

MATERIAL HANDLING DEVICE Filed Aug. 6, 1945 IBY Patented June 1, 1948 UNITED STATES rATENToFFicE HANDLING DEVICE George J. Hulbert, Seattle, Wash.

Application August 6, 1945, Serial No. 609,103 I 3 Claims. (Cl. 212-8) This invention relates to material handling devices.

An object of this invention is to provide a material handling device that is particularly well adapted for use in building yconstruction to deliver building material to a location where it is to be used.

Another object of this invention is to provide a material handling device that can be operated by hand and that is well adapted for delivering roofing slabs onto a roof to which they are to be applied. A

Another object is to provide a material handling device comprising a carriage having a boom pivoted thereto approximately mid-way between the two ends of the boom for swinging movement, and having winch operated means for hoisting or lowering a load relative to the boom,

Other objects are to provide a material handling device that is simple in construction, eiiicient in operation, not expensive to build and one that will make possible asaving in labor and an increase in efficiency in the application of roofs where large heavy roof panels are used.

Other objects of the invention will be apparent from the following descriptiony taken in connection with the accompanying drawings.

In the drawings Fig. 1 is a front elevation vof a material handling device constructed in accordance with my invention showing a hoisting boom thereof in a generally upright position. v

Fig. 2 is an end view of said device, showing by full lines the hoisting boom in a substantially upright position and by dot and dash lines said boom in an inclined position and also showing by dot and dash lines the outline of a building to which material is to be delivered by this material handling device.

Like reference numerals designate like parts throughout the several views.

This device comprises a rolling scaffold or -carriage mounted on wheels 5. The carriage 5 is adapted to be moved along any suitable deck or run-way 1, that is provided alongside of a building or like structure Il to which material is to be delivered. The building 4 is shown by dot and dash lines in Fig. 2. v

The carriage 5 is provided with upperand lower cross pieces 8 and 5 that project outwardly from the outermost side of said frame. Substantially upright frame members I0 'are secured to 'the overhanging end portions of the cross pieces 8 and 9 and extend to a substantial distance above the carriage 5. The frame members IIB are slightly inclined toward the building 4 from bottom to top 2 of said members I0 for purposes hereinafter expl-ained.

A swinging boom is composed of spaced apart longitudinal boom members II and suitable cross braces and angular braces I2. This swinging boom is pivotally supported by a cross shaft I3 that extends crosswise through the upper end portions of the upright frame members Ill. The cross shaft or pivot member I3 is positioned's'ubstantially mid-'waybetw'een the two ends of the boom members Il so that the boom is approximately balanced on the pivot I3 as respects its weight. The lower ends of the boom members II are just clear of the deck 'I when the boom is in a substantially upright position and the carriage is resting evenly on all four wheels 6. If the upper portion of the carriage starts to tilt away from the building 4 then the lower ends of these upright frame members I0 will engage with the deck 'I and arrest such tilting movement.

A snubbing line or rope I4 is secured tothe lower end portion of the swinging boom and may be used by an operator to control the swinging movement of the boom. The loose end portion'of the nrope I4 may be snubbed around' a suitable cross piece 29 that is rigid with the carriage,

A sheave I5 is rotatively mounted `on the cross shaft I3 and another sheave I6 is rotatively mounted on'another cross shaft I1 at the` upper end of the boom. i

A winch or winding drum I8 is mounted on the 'carriage 5in a convenient location for hand operation. A' hauling cable I9 is wound on the winchpl and passes upwardly over the guide sheave I5,fth`ence around the top sheave .It4 and thence downwardly along the boom. A hook 20 is provided on the lower end portion' of 'the cable I9.

Preferably locking means such las a bolt 2l 'is provided for locking the swinging boom in the up right position. Also preferably the winch I8 is provided with locking means which maybe used to lock the winch in any'desired position. This winch locking means may be a'pawl 22 adapted to engage with ratchet teeth 23 on the winch Ill.`

A crank- 24 is provided on the winch I8 -fornianual operation of the same. One use 'for-fwhich'this' device is well suited is for delivering -large sheets' of roong material 25 'onto VaroofY 21.' to which they are to be applied. These sheets 26 'are relai' tively large, being as much as nine feet long and three feet wide. Also they are too heavy and cumbersome for one man to pickup'and carry.

28 to facilitate handling.

In elevating these sheets 26 of roofing with my device the swinging boom is placed in a generally upright position in which it is parallel to the frame members I and slightly inclined toward the building and a sheet 26 of the roofing is leaned against the lower end portion of this swinging boom, see Fig. 2. The hook 20 is engaged within a4 hole 28 in the rooiing sheet 26 and the winch I8 is operated to elevate the sheet 26 along the boom. The' sheet 26 is wide enough so that it slides on the members I I The boom is inclined toward the building just enough so that the upper end portion of this boom will tend to swing toward the building as soon as the major portion of the roong sheet 26 ,distance between the pivot and the bottom of the carriage whereby the bottom end portion of said Vboom will be clear of the surface on which the is moved above the cross shaft I3. The shaft I3 is preferably positioned a short distance below the eave portion of the building. This makes it possible for the operator, by slacking the snubbing rope I4, to lay the upper end portion of the boom down on the roof 21 and then by further Winding of the hauling line I9 on the winch I8 to draw the roofing panel or load 26 to the upper end of the boom or to any desired location where said load may be most conveniently removed.

Preferably a cross piece 25 is provided on the boom near the upper end portion thereof to rest on the roof 21 when the boom is in the inclined position. Y

Obviously a load may be lowered fromthe roof 21 by placing it on the boom, attaching the hook thereto lowering the load along the boom and swinging the .boom into the substantially upright position. In so lowering a load it is possible to rst elevate the boom with the load thereon into an upright position and then lower the load or to slide the load down along the inclined boom until the load is approximately over the pivot shaft I3 then swing the boom into the generally upright position and complete the lowering of the load.V i

Oppositely extending cables 39 may be secured to the frame members I0 to help in moving the carriage along'the deck 1 parallel to the building 4 or to hold the carriage in a fixed position.

This device can be operated by hand for elevating material onto a roof or any other part of a building Within reach of the boom I I. Also, if desired, provision can be made for using power means in the operation of the winch I8.

It is also possible to use this material handling device inside a building with the upper end portion thereof extending upwardly through a partly completed roof between the purlins or rafters thereof. To facilitate use of this device in this manner I preferably provide on the shaft I1 at the upper endof the boom Il, two or more rollers 29 over which the material that is being elevated may easily be rolled or drawn off over the top end portion of the boom. Obviously material so elevated could be discharged over the top end of the boom by pulling on the hoisting lcable I9 or it could be removed by a person'on the roof.'

This device is simple and efficient an-dmakes it possible for one person to elevate sheets 26- of roong to 'a roof atV a great saving in time and labor as Vcompared to the usual method of carrying these sheet'sup onto' a roof.

Obviously' changes in my invention may be made withinA the scope and spirit of the following claims.

I claim:

l. A hoist for delivering material onto a, building comprising a carriage movable along the side of a building; upright frame means rigidlysecarriage is supported when the boom is in a substantially upright position; a sheave carried by -the upper end portion of said boom; another sheave coaxial with the pivot of said boom; a hoisting cable operable over said sheaves adapted to have one end portion connected with a load that is positioned against the outer face of said boom and to have a pull exerted thereon to move a load upwardly along said bo-om; and a snubbing cable connected with the lower end portion of the boom for controlling the swinging movement of said boom.

2. In material handling means, a carriage; wheels supporting said carriage for movement along a runway; rigid frame means rigidly secured to said carriage and extending above said carriage at one side thereof; a boom pivoted to the upper end portion of said frame means approximately mid way between its two ends; two sheaves carried by said boom and positioned respectively adjacent the upper end of said boom and on the pivotal axis of said boom; a hoisting cable operable on said sheaves adapted to have its upper end portion connected with a load; means operable to limit the extent of pivotal movement of said boom; and a winch on said carriage, the hoisting cable being connected with said winch for operating said cable.

3. In material handling means, a carriage; rigid frame means rigidly secured to said carriage and extending above said carriage at one l'side thereof; a boom pivoted to the upper end portion of said frame :means approximately mid way between its two ends and arranged to swing from a substantially upright position sidewise over said carriage; a snubbing cable connected with the lower end portion of said boom to limit the extent of pivotal movement of the boom; two sheaves carried by said boom and positioned respectively at the upper end portion of said boom and on the pivotal axis of said boom; a hoisting cable operable on said sheaves to lift a load upwardly along said boom, said hoisting cable being adapted to have its upper end portion connected with a load; and a winch mounted on said carriage adjacent the lower end portion of said upright frame and having the lower end portion of the hoisting cable connected therewith for operating said hoisting cable.

GEORGE J. HULBERT.

REFERENCES CITED The following vreferences are of Vrecord in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,354,501 Manley Oct. 5, 1920 1,585,915- Hohaus May 25, 1926 2,358,339 Lucas Sept, 19, 1944 2,375,337 Wilson May 8, 1945 

